1. Amthauer, G., Annersten, H., Hafner, S.S.: The Mössbauer spectrum fo 57Fe in silicate garnets. Z. Krist. 143, 14?55 (1976)
2. Burnham, C.W., Ohashi, Y., Hafner, S.S., Virgo, D.: Cation distribution and atomic thermal vibrations in an iron-rich orthopyroxene. Am. Mineralogist 56, 850?876 (1971)
3. Burns, R.G.: Mixed valencies and site occupancies of iron in silicate minerals from Mössbauer spectroscopy. Can. J. Spectros. 17, 51?59 (1972)
4. Clark, M.G., Bancroft, G.M., Stone, A.J.: Mössbauer spectrum of Fe2+ in a square-planar environment. J. Chem. Phys. 47, 4250?4261 (1967)
5. Evans, B.J.: Experimental studies of the electrical conductivity and phase transitions in Fe3O4. AIP Conf. Proc. 24, 73?78 (1975)